Mail app question

I have 1.1.2 jailbreaked and working well on my touch. I can get e-mail from AOL and .Mac, but my work e-mail is through Outlook. When I connect through my wifi at work, my work mail connects and downloads mail. However, when I try to attempt to connect to my work e-mail through wifi at home, it will not connect. Same thing if I go via the web through Safari.